在.Net Compact Framework 3.5中使用GZip

在.Net Compact Framework 3.5中将数据加压

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.IO.Compression;

namespace MRSDataSync.Helper
{
    public class GZip
    {
        private Encoding encode = Encoding.UTF8;

        public byte[] zipData(byte[] inputData)
        {
            if (inputData == null)
            {
                throw new ArgumentNullException("input data cannot be null.");
            }

            byte[] result;

            #region MS compressor
            MemoryStream mso = null;
            try
            {
                mso = new MemoryStream();
                GZipStream gzipStream = null;
                try
                {
                    gzipStream = new GZipStream(mso, CompressionMode.Compress, false);
                    gzipStream.Write(inputData, 0, inputData.Length);
                }
                catch (Exception ex)
                {
                    System.Diagnostics.Debug.WriteLine(ex.Message + "\r\n" + ex.StackTrace);
                    throw;
                }
                finally
                {
                    if (gzipStream != null)
                    {
                        gzipStream.Close();
                        gzipStream.Dispose();
                        gzipStream = null;
                    }
                }

                result = mso.ToArray();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message + "\r\n" + ex.StackTrace);
                throw;
            }
            finally
            {
                if (mso != null)
                {
                    mso.Close();
                    mso.Dispose();
                    mso = null;
                }
            }

            return result;
            #endregion
        }

        public byte[] unZipData(byte[] inputData)
        {
            if (inputData == null)
            {
                throw new ArgumentNullException("input data cannot be null.");
            }

            byte[] result;

            #region MS decompressor
            MemoryStream msi = null;
            MemoryStream mso = null;
            try
            {
                msi = new MemoryStream(inputData);
                mso = new MemoryStream();
                GZipStream gzipStream = null;
                try
                {
                    gzipStream = new GZipStream(msi, CompressionMode.Decompress, false);
                    #region copy stream
                    const int BUFFER_SIZE = 4096;
                    byte[] buffer = new byte[BUFFER_SIZE];
                    int bytesRead;
                    long totalBytesRead = 0;
                    while ((bytesRead = gzipStream.Read(buffer, 0, BUFFER_SIZE)) != 0)
                    {
                        mso.Write(buffer, 0, bytesRead);
                        totalBytesRead += bytesRead;
                    }
                    mso.Flush();
                    #endregion
                }
                catch (Exception ex)
                {
                    System.Diagnostics.Debug.WriteLine(ex.Message + "\r\n" + ex.StackTrace);
                    throw;
                }
                finally
                {
                    if (gzipStream != null)
                    {
                        gzipStream.Close();
                        gzipStream.Dispose();
                        gzipStream = null;
                    }
                }

                result = mso.ToArray();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message + "\r\n" + ex.StackTrace);
                throw;
            }
            finally
            {
                if (msi != null)
                {
                    msi.Close();
                    msi.Dispose();
                    msi = null;
                }

                if (mso != null)
                {
                    mso.Close();
                    mso.Dispose();
                    mso = null;
                }
            }

            return result;
            #endregion
        }

        public byte[] zipStr2Data(string inputData)
        {
            byte[] strData = encode.GetBytes(inputData);
            return zipData(strData);
        }

        public string unZipData2Str(byte[] inputdata)
        {
            byte[] outData = unZipData(inputdata);
            return encode.GetString(outData, 0, outData.Length);
        }
    }
}